21
Theme 4 Imaging and Biomedical Engineering 2017/18

Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

  • Upload
    others

  • View
    2

  • Download
    0

Embed Size (px)

Citation preview

Page 1: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

Theme 4

Imaging and Biomedical

Engineering

2017/18

Page 2: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

2

Contents

1.4 Mechanisms of the dual epidemics of atrial fibrillation and heart failure: Image-based biophysical modelling approach ............................................................................................................................. 4

2.4 Hydrogels formed by peptide self-assembly as artificial extracellular matrices to study migration and control stem cell fate ...................................................................................................................... 5

3.4 Automated classification of prostate cancer phenotypes from magnetic resonance imaging: a deep learning approach powered by big data .................................................................................................... 6

4.4 Image guided drug delivery using Magnetoliposomes ............................................................................. 7

5.4 Investigations of the impact of EGFR/HER3 treatments on the cancer: immune stromal microenvironment interface, imaged by multiphoton and MR elastography techniques ................. 8

6.4 Neonatal multi-modal brain network features as biomarkers of altered neurodevelopment in high-risk infants ....................................................................................................................................................... 9

7.4 PET imaging of Anticancer Nanomedicines – A Theranostic Tool ..................................................... 10

8.4 Radiolabelling, evaluation and validation of a new 18F metomidate derivative for PET Imaging of Aldosteronomas ................................................................................................................................... 11

9.4 Developing in vivo traceable diagnostic and therapeutic IgE-like antibodies. ............................ 12

10.4 Hierarchically designed functionalized self-assembling peptide scaffolds for bone tissue engineering .................................................................................................................................................................. 14

11.4 In vivo myelin mapping with PET-MR imaging ...................................................................................... 15

12.4 Targeted radionuclide therapy: a new weapon in the war against microbial multi-drug resistance ...................................................................................................................................................................... 16

13.4 Improving stratification of valve stenosis through novel echocardiographic and computational methods ........................................................................................................................................... 17

14.4 Cancer stem cell theranostics: Copper compounds for both diagnostic PET imaging and chemotherapy ............................................................................................................................................................. 18

15.4 Radiobiological assessment of radionuclide pairs used in theranostic (imaging and therapy) approaches. ................................................................................................................................................ 19

16.4 Nano-scale engineering of the stem cell niche to generate iPS-hepatocytes for treatment of liver failure ................................................................................................................................................................... 21

Page 3: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

3

This theme focuses on the link between biomedical and physical sciences –

particularly physics, engineering and computational approaches. Clinical functional

and molecular imaging (MRI, PET, X-MR and PET-MR) is a major strength, along

with computational modelling and biomaterials (particularly in the Dental Institute).

Lead: Professor Phil Blower

When choosing a project from this catalogue in the funding section of the online application form

please enter: MRCDTP2016_Theme4

Deadline for application: Sunday 11th December 23:59

Shortlisted candidates will be contacted in mid-January and invited to an interview on one of the two

dates in February.

Interviews: 6th & 7th February 2017

The 2017/18 studentships will commence in September 2017.

For further Information or queries relating to the application process please contact

[email protected]

Page 4: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

4

1.4 Mechanisms of the dual epidemics of atrial fibrillation and heart failure: Image-

based biophysical modelling approach

Co-Supervisor 1: Dr Oleg Aslanidi

Research Division or CAG: Imaging Sciences & Biomedical Engineering

E-mail: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/oleg.aslanidi.html

Co-Supervisor 2: Prof Mark O’Neill

Research Division or CAG: Cardiovascular Clinical Academic Group

Email: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/mark.oneill.html

Project Description:

Clinical treatment of complex and interlinked cardiovascular epidemics of atrial fibrillation (AF) and heart failure

(HF) in the same patient is extremely challenging, and understanding of AF-HF mechanisms is crucial for

designing efficient therapy. This project will explore the role of two major risk factors common in both AF and

HF − abnormal adrenergic response and fibrosis– and their contributions to the interlinked mechanisms of AF-

HF. Specifically, it will combine medical imaging [1] to quantify 3D atrial distributions of adrenergic innervation

and fibrosis in AF-HF patients and advanced biophysical modelling [2] to address the fundamental lack of

knowledge regarding effects of these risk factors on the electrophysiological function in AF-HF patients. The

novel knowledge will be applied to predict clinical therapy that can mitigate such mechanisms in a patient. Thus,

an interdisciplinary approach will be applied to create an image-based computational workflow for the

characterisation of AF-HF patient state, and ultimately for tailoring therapy to the need of a patient.

MRes: Computational study of AF-HF electrophysiology; Year 1: PET and MRI data acquisition for quantify

3D atrial innervation and fibrosis; Year 2: Development of biophysical models integrating the imaging and

electrophysiological data; Year 3: Model validation against AF-HF patient electro-anatomical mapping data and

prediction of optimal therapy. Supervisors: OA will provide expertise in biophysical modelling and imaging of

the atria and help the student develop computational skills; MON will provide expertise in electro-anatomical

mapping of AF-HF patients and support the student to learn about ablation therapy. Candidate: Degree in

Biomedical Engineering or related discipline.

Two representative publications from supervisors:

[1] Harrison JL, Sohns C, Linton NW, Karim R, Williams SE, Rhode KS, Gill J, Cooklin M, Rinaldi CA, Wright

M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance

prediction of endocardial voltage and gaps in ablation lesion sets. Circulation Arrhythmia & Electrophysiology

2015; 8(2): 270-78. DOI: 10.1161/circep.114.002066.

[2] Morgan R, Colman MA, Chubb H, Seemann G, Aslanidi OV. Slow conduction in the border zones of patchy

fibrosis stabilizes the drivers for atrial fibrillation: Insights from multi-scale human atrial modeling. Frontiers in

Physiology 2016; 7: 474. DOI: 10.3389/fphys.2016.00474.

Page 5: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

5

2.4 Hydrogels formed by peptide self-assembly as artificial extracellular matrices to

study migration and control stem cell fate

Co-Supervisor 1: Dr Eileen Gentleman

Research Division or CAG: Dental Institute

E-mail: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/eileen.gentleman.html

Co-Supervisor 2: Dr Cecile Dreiss

Research Division or CAG: Institute of Pharmaceutical Sciences

Email: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/cecile.dreiss.html

Project description:

The extracellular matrix (ECM) is organised in space and time through molecular self-assembly, lending it

important properties to direct stem cell differentiation and control migration, both of which are fundamental in

health and disease. Current 3D scaffold designs do not replicate the self-assembled, dynamic nature of the native

ECM and so are poor models for studying these processes. 3D in vitro models that mimic the dynamic ECM

have the potential to reveal fundamental insights in development, cancer metastasis and wound healing, as well

as direct stem cell differentiation for tissue engineering. Recent studies have shown that peptides that self-

assemble into fibrillar nanostructures like the ECM constantly and dynamically disassemble and re-assemble.

For this interdisciplinary project, we are looking for a motivated student with a background in either chemistry,

physics, cell biology or engineering to build on this discovery and synthesise 3D hydrogels that form by peptide

self-assembly. This platform system will allow us to systematically control 3D stiffness, the spatial distribution of

cell adhesive ligands, and the underlying molecular interactions. We will then structurally and mechanically

characterise the hydrogels and use them to explore key biological questions in directing stem cell fate for

regenerative medicine and mechanically controlling cell migration. Specifically, we will:

1. Produce hydrogels by synthesising peptides that form dimers (characterised by circular dichroism,

isothermal calorimetry), conjugate them with polymers, and determine their nanoscale structure and

mechanical properties using small-angle neutron scattering, atomic force microscopy, and rheology.

(year 1/2)

2. Encapsulate fluorescently tagged human mesenchymal stem cells and highly migratory cells (e.g.

neural crest, dermal fibroblasts) within hydrogels and monitor their differentiation and/or migration

using molecular biology, immunohistochemistry, and live cell multi-photon microscopy techniques.

We will also investigate dynamic processes using super-resolution microscopy (STORM), single

molecule fluorescence localisation and force microscopy. (year 2/3)

Two representative publications from supervisors:

[1] Gentleman, E. et al. Comparative materials differences revealed in engineered bone as a function of cell-

specific differentiation. Nat. Mater. 8:763-70 doi:10.1038/nmat2505 (2009).

[2] Walters, N. J. & Gentleman, E. Evolving insights in cell–matrix interactions: Elucidating how non-

soluble properties of the extracellular niche direct stem cell fate. Acta Biomater. 11:3-16

doi:10.1016/j.actbio.2014.09.038 (2015).

Page 6: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

6

3.4 Automated classification of prostate cancer phenotypes from magnetic resonance

imaging: a deep learning approach powered by big data

Co-Supervisor 1: Giovanni Montana

Research Division or CAG: Biomedical Engineering

E-mail: [email protected]

Website: https://wwwf.imperial.ac.uk/~gmontana/

Co-Supervisor 2: Gary Cook

Research Division or CAG: Cancer Imaging

Email: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/gary.cook.html

Project description:

Determining clinically significant prostate cancer remains a major challenge. The aggressiveness of prostate

cancer is routinely assessed using the histological biopsy Gleason score (GS). However, the GS measurements

determined through biopsy suffer from sampling bias and cancer heterogeneity, and often differ from

measurements obtained following radical prostatectomy and those made between immediate repeat biopsies.

There is an unmet clinical need to improve non-invasive characterisation of prostate cancer, reducing the need

for as many biopsy cores and improving treatment planning that current standard multi-parametric MRI

(mpMRI) only partially addresses.

In this project we will develop a mpMRI-based predictive system for fully-automated prostate cancer profiling,

that leverages “big data” and recent developments in “deep learning”. An initial population of 5,000 confirmed

prostate cancer patients treated at Guy’s and St Thomas’ NHS Trust over the last 8 years has been identified

with full electronic clinical records, including mpMRI and histopathology.

In Year 1 we will build on prior work in natural language processing for entity detection in radiological texts

(Cornegruta et al 2016) and extract relevant clinical indicators such as GS from radiological reports. In Year 2

we will develop a deep learning algorithm for the fully automated detection of the prostate gland and malignant

tumours from raw MR images. In Year 3 we will develop and validate state-of-the-art deep neural networks (e.g.

Ypsilantis at al 2015) for learning mpMRI imaging features that are highly predictive of the measurements. In

Year 4 we will produce a user friendly software application to enable clinicians to adopt the methodology.

Two representative publications from supervisors:

[1] Ypsilantis P., Siddique M., Sohn H., Davies A., Cook G., Goh V., and Montana G. (2015) Predicting

response to neoadjuvant chemotherapy with PET imaging using convolutional neural networks. PloS One.

[2] Cornegruta S., Bakewell R., Withey S., and Montana G. (2016) Modelling Radiological Language with

Bidirectional Long Short-Term Memory Networks. 7th International Workshop on Health Text Mining and

Information Analysis

Page 7: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

7

4.4 Image guided drug delivery using Magnetoliposomes

Co-Supervisor 1: Dr Maya Thanou

Research Division/Department or CAG: Institute of Pharmaceutical Science

E-mail: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/maya.thanou.html

Co-Supervisor 2: Dr Po-Wah So

Research Division/Department or CAG: Institute of Psychiatry, Psychology & Neuroscience

Email: [email protected]

Website: http://https://kclpure.kcl.ac.uk/portal/po-wah.so.html

Name of Collaborating Clinicians: Professor Afshin Gangi, Professor Michael Douek

Research Division/Department or CAG: Perinatal Imaging & Health

Email: [email protected], [email protected]

Website:https://kclpure.kcl.ac.uk/portal/afshin.gangi.html,

https://kclpure.kcl.ac.uk/portal/michael.douek.html

Project description:

We have successfully developed MRI/optical bimodal liposomes that encapsulate a series of anticancer agents.

The liposomes have thermosensitive properties and release the drug when activated by local hyperthermia.

Liposomes’ biodistribution in tumours is monitored via imaging, when liposomes are detected in the tumour,

hyperthermia is applied using Focused Ultrasound. Focal hyperthermia induces the liposomes to become leaky

and release their therapeutic cargo instantly within the tumour only. This method can lead to maximum dosing

of anticancer agent. MRI guided focused ultrasound is a technique currently available in the clinic (Prof. Gangi-

KCL). We aim now to prepare liposomes for MRI guided Focused Ultrasound technique (2 patents PCT 2016-

King’s Commercialisation Institute).

Milestone 1: NIRF/MRI labelled magnetoliposomes 1) The student will be preparing thermosensitive

liposomes labelled with NIRF probes loaded with super-paramagnetic iron oxide nanoparticles

(SPIONs) for MRI. The student will test the imaging properties of these liposomes in solutions.

Milestone 2: The student will be trained on preparing drug containing magnetoliposomes and

investigating drug release, pharmacokinetics and biodistribution by MRI in mice tumour models.

Milestone 3: The student will be studying methods of SPION imaging by MRI and activating these

magnetoliposones using MRIgFUS.

Milestone 4: In vivo Proof of Concept experiments (Home office project license PPL/7008687) in mice

using optical imaging-FUS (preclinical) and MRIgFUS (Clinical)

Prof Phillip Blower and Dr Rafa Torres will be collaborating (part of the supervisory team) to provide expertise

on iron oxide nanoparticles as well as the potential to prepare these magnetoliposomes for PET/MRI imaging.

This project is suitable for students of Chemistry, Pharmacy, Material Sciences, and Bioengineering.

Two representative publications from supervisors:

[1] Thermosensitive, Near-Infrared-Labeled Nanoparticles for Topotecan Delivery to Tumors

Rosca, E. V., Wright, M., Gonitel, R., Gedroyc, W., Miller, A. D. & Thanou, M. May 2015 In : Molecular

Pharmaceutics. 12, 5, p. 1335-1346

[2] Biomodal paramagnetic and fluorescent liposomes for cellular and tumor magnetic resonance imaging.

Kamaly N, Kalber T, Ahmad A, Oliver MH, So PW, Herlihy AH, Bell JD, Jorgensen MR, Miller AD. Jan 2008

In : Bioconjug Chem. 19(1): 118-29.

Page 8: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

8

5.4 Investigations of the impact of EGFR/HER3 treatments on the cancer: immune

stromal microenvironment interface, imaged by multiphoton and MR elastography

techniques Co-Supervisor 1: Prof. Tony Ng

Research Division or CAG: Cancer & Randall

E-mail: [email protected]

Website: http://www.kcl.ac.uk/lsm/research/divisions/randall/research/sections/cell/ng/ngtony.aspx

Co-Supervisor 2: Prof. Ralph Sinkus

Research Division or CAG:

Email: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/ralph.sinkus.html

Project description:

A bedside-to-bench study, which is related to an ongoing Pan-European Phase II translational clinical trial, is

proposed to investigate the impact of EGFR/HER3 targeting on the immune stromal microenvironment

remodeling in head and neck cancers. The candidate who should have a cell biology/biophysics background will

take part in our ongoing work on therapy-induced ErbB/HER receptor rewiring in cancer cells/tissues/exosome.

The Skill training #1 will be on “Imaging the HER receptor dimer network both physiologically and under

therapeutic pressure; and its mechanistic linkage to unfolded protein response (UPR) which we have shown to

occur in response to EGFR treatments, in our established preclinical head and neck tumour mouse model

(Multiphoton Cell Imaging Techniques in T Ng’s lab, as applied to ErbB/HER receptors: Current Biology

19;1788 (2009), Science Signaling 7: ra78 and 7: ra29 (2014), ONCOTARGET 7: 51012 (2016), ACS Nano

(2016) (Year 1 objective).

Only 30-40% of patients respond to immune checkpoint therapies in various cancer types and currently there

are no reliable predictive tools for assigning treatment. We propose to undertake a multidisciplinary approach,

including the use of MR elastography techniques (Skill training #2) to probe the tumour microenvironment

regarding collagen remodelling (Magnetic resonance in medicine 58: 1135 (2007), Phys. Rev. Lett. 115, 094301

(2015)), to study this crosstalk mechanism The candidate will learn from Professor Sinkus how to use the MRI-

based elastography method to quantify the biomechanical nature of the cancer stromal tissues in whole animals

treated with EGFR treatments which will affect the immune stromal microenvironment (Year 2 objective).

The goal is to unravel the scientific mechanisms which may help clinicians to combine immunotherapeutics with

molecularly targeted approaches, including the use of anti- HER therapeutics; in order to improve treatment

efficacy; supported by imaging human samples (tissues/blood exosomes) from the Phase II trial (Year 3/4

objective).

Two representative publications from supervisors:

[1] Sinkus R, Siegmann K, Xydeas T, Tanter M, Claussen C, Fink M (2007) MR elastography of breast

lesions: understanding the solid/liquid duality can improve the specificity of contrast-enhanced MR

mammography. Magnetic resonance in medicine 58: 1135-1144

[2] Kiuchi T, Ortiz-Zapater E, Monypenny J, Matthews DR, Nguyen LK, Barbeau J, Coban O, Lawler K,

Burford B, Rolfe DJ, de Rinaldis E, Dafou D, Simpson MA, Woodman N, Pinder S, Gillett CE, Devauges V,

Poland SP, Fruhwirth G, Marra P, Boersma YL, Pluckthun A, Gullick WJ, Yarden Y, Santis G, Winn M,

Kholodenko BN, Martin-Fernandez ML, Parker P, Tutt A, Ameer-Beg SM, Ng T (2014) The ErbB4 CYT2

variant protects EGFR from ligand-induced degradation to enhance cancer cell motility. Science signaling 7:

ra78

Page 9: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

9

6.4 Neonatal multi-modal brain network features as biomarkers of altered

neurodevelopment in high-risk infants

Co-Supervisor 1: Professor Serena Counsell

Research Division or CAG: Imaging Sciences & Biomedical Engineering

E-mail: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/serena.counsell.html

Co-Supervisor 2: Dr Dafnis Batalle

Research Division or CAG: Imaging Sciences & Biomedical Engineering

Email: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/dafnis.batalle.html

Name of Collaborating Clinician: Professor David Edwards

Research Division or CAG: Imaging Sciences & Biomedical Engineering and Neonatal Unit

Email: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/david.edwards.html

Project description:

Disrupted perinatal brain development is associated with life-long cognitive and behavioural impairment, which

imparts a significant burden to the individual, their families and society. There is an urgent need to identify

impairments in brain development in the neonatal period, when intervention with appropriate therapies may be

possible. Sensitive biomarkers are required to assess the effects of these treatments at an early stage. Powerful

new magnetic resonance imaging (MRI) methods are becoming available and it is likely that a multi-modal

imaging approach will be both more sensitive to injury and more closely correlated to subsequent performance

than approaches that rely on any single imaging technique. This project will use brain connectivity analysis of

multi-modal MRI data obtained in the early neonatal period to develop early imaging biomarkers of

neurodevelopmental performance in children who are at high-risk of impairment.

Specific Aims

Year 1: (i) Generate structural and functional connectivity characteristics from multi-modal (diffusion and

functional) MR data. (ii) Correlate imaging results with neurodevelopmental performance at 2 and 4.5 years,

and with perinatal clinical variables (for example respiratory morbidity, gestation at birth).

Year 2: Develop machine-learning models allowing blind prediction of altered neurodevelopment.

Year 3: Determine generalizability of the biomarkers obtained by assessing an independent neonatal

neuroimaging dataset.

Skills Training

The project will suit a student with a background in computer science, physics or mathematics. The student will

receive training in image analysis including; graph theory analysis, biophysical modelling of diffusion MRI data

and neonatal MRI.

Two representative publications from supervisors:

[1] Ball G, Aljabar P, Zebari S, Tusor N, Arichi T, Merchant N, Robinson EC, Ogundipe E, Rueckert D,

Edwards AD, Counsell SJ. Rich-club organisation of the newborn human brain. Proc Natl Acad Sci USA 2014

20;111(20):7456-61. doi: 10.1073/pnas.1324118111. Epub 2014 May 5.

[2] Batalle D, Muñoz-Moreno E, Tornador C, Bargallo N, Deco G, Eixarch E, Gratacos E; Altered resting-

state whole-brain functional brain networks of neonates with intrauterine growth restriction; Cortex, 2016, 77,

pp. 119-131

Page 10: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

10

7.4 PET imaging of Anticancer Nanomedicines – A Theranostic Tool Co-Supervisor 1: Dr Rafael T. M. de Rosales

Research Division or CAG: Imaging Sciences & Biomedical Engineering

E-mail: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/rafael.torres.html

Co-Supervisor 2: Prof Bob Hider

Research Division or CAG: Pharmaceutical Science

Email: [email protected]

Website: http://www.kcl.ac.uk/lsm/research/divisions/ips/research/chembio/Staff/Hider.aspx

Project description:

Nanomedicine has the potential to help personalize cancer treatments and reduce side effects of therapeutic

drugs. While some progress has been made toward the latter goal, customized treatments are still hard to come

by. Our research group is interested in developing method for seeing where certain cancer drugs accumulate in

the body in order to better treat patients.

Recent research has shown how complicated is to customize treatment for cancer patients. As one might expect,

the same drug will accumulate in tumors at varying concentrations in patients with different cancers, but also

those with the same kind of cancer. To evaluate which patients would benefit nanomedicinal treatment, it would

be helpful to determine if a drug will target the right places at effective concentrations. We want to address this

challenge using PET imaging, an imaging technique allow us to detect and quantify areas of nanomedicine

uptake with high accuracy and spatial resolution compared to other medical imaging techniques.

In this project we will build up from recent work in the group where we developed a simple method to attach

PET labels to liposomal nanomedicines containing metal-binding anticancer drugs (1). We will extend this

method to nucleic acids (e.g. RNAi or DNA) and metal-binding molecules used in cancer chemotherapy (Y1-

2, nanomedicine synthesis– supervised by RTMR/RH). After radiolabeling optimisation (Y2-3, radiochemistry

– supervised by RTMR), the nanomedicines will be tracked using positron emission tomography (PET) to see

where they go within the body. Imaging with PET in mouse models of breast, ovarian and prostate cancer (Y2-

4, PET imaging – supervised by RTMR/RH) will allow us to see and quantify if the drug accumulates in tumors

and metastases. The final aim is to prove that out PET imaging technology allows the prediction of therapeutic

outcomes.

Two representative publications from supervisors:

[1] S. Edmonds, et al. Exploiting the Metal Chelating Properties of the Drug Cargo for In Vivo Positron

Emission Tomography Imaging of Liposomal Nanomedicines, ACS Nano, 2016, IN PRESS

(http://pubs.acs.org/doi/abs/10.1021/acsnano.6b05935 ) - Available from 28th October

[2] D. Berry et al. Efficient bifunctional gallium-68 chelators for positron emission tomography:

tris(hydroxypyridinone) ligands, Chemical Communications, 2011, 47, 7068.

(http://pubs.rsc.org/en/content/articlehtml/2011/cc/c1cc12123e)

Page 11: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

11

8.4 Radiolabelling, evaluation and validation of a new 18F metomidate derivative for

PET Imaging of Aldosteronomas

Co-Supervisor 1: Salvatore Bongarzone

Research Division or CAG: Division of Imaging Sciences and Biomedical Engineering

E-mail: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/salvatore.bongarzone.html

Co-Supervisor 2: Andrew Webb

Research Division or CAG: Cardiovascular Division

Email: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/andrew.1.webb.html

Project description:

Scientific basis: Primary hyperaldosteronism accounts for 6-15% of hypertension - the single biggest contributor

to global morbidity and mortality. Whilst ~50% of patients with hyperaldosteronism have unilateral aldosterone-

producing adenomas, only a minority have curative surgery, as current identification is poor. Microadenomas

(<1cm) are often missed on CT/MRI and biochemical/endocrine tests. The rise of PET-CT, specific/sensitive

imaging technique for the detection of tumors, has yielded great interest towards developing new diagnostic

PET radiotracer. The PET radiotracer 11C-Metodomidate (MTO), a potent inhibitor of CYP11B2 beta

hydroxylase, is selectively taken up by active adenomas. However, [11C]Metomidate’s short 20-min half-life

limits its use to PET sites with a cyclotron. The ability of MTO to selectively target adrenocortical lesions has

presented a molecular template upon which modifications can be made to greatly enhance its properties.

Translational aspect: we have developed a longer-lived fluorine-18-labelled metomidate-PET radiotracer

([18F]FAMTO, 2-hour half-life) to allow lower-cost imaging for many more patients locally and nationally

through wider distribution.

The PhD candidate will pursue optimization of the synthesis, in vitro and in vivo characterization of

[18F]FAMTO allowing its translation to pre-clinical and clinical evaluation.

First Year:

Aim: Basic understanding and practices of PET radiochemistry and PET radiopharmacology.

Skills training: Radiotracer design, 18F-radiochemistry, Radio-analytical and purification techniques. Contact

with Hypertension clinics for clinical perspective.

Second Year:

Aim: In vitro characterisation of [18F]FAMTO.

Skills training: Radioligand binding assays, human and animal tissue sections and autoradiography.

Third and Fourth Years:

Aim: In vivo characterisation of [18F]FAMTO.

Skills training: In vivo techniques and ethics: microPET, metabolite analysis, tracer administration, personal

Home Office Licensee training. Further clinical contact.

Two representative publications from supervisors:

[1] [11C]CO2 to [11C]CO Chemical Conversion: A Novel Route for [11C]Carbonylation Reactions. Taddei,

C*; Bongarzone S*, Haji Dheere A, Gee A D. ChemComm (2015) 51, 59, 11795-11797

[2] Omar SA, Fok H, Tilgner KD, Nair A, Hunt J, Jiang B, Taylor P, Chowienczyk P, Webb AJ.

Paradoxical normoxia-dependent selective actions of inorganic nitrite in human muscular conduit arteries and

related selective actions on central blood pressures. Circulation. 2015;131:381-389.

Page 12: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

12

9.4 Developing in vivo traceable diagnostic and therapeutic IgE-like antibodies.

Co-Supervisor 1: Dr Gilbert Fruhwirth

Research Division/Department or CAG:Imaging Sciences / Imaging Chemistry and Biology

E-mail: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/gilbert.fruhwirth.html

Co-Supervisor 2: Dr Sophia Karagiannis

Research Division/Department or CAG: Skin Sciences / St John’s Institute of Dermatology

Email: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/sophia.karagiannis.html

Name of Collaborating Clinician: Prof. James F Spicer

Research Division/Department or CAG: Division of Cancer Studies, Faculty of Life Sciences and Medicine

Email: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/james.spicer.html

Project description:

Human immunity produces several antibody classes. IgE class antibodies are the least abundant with very short

serum half-lives, but the longest residence times in target tissues. Specific glycosylation patterns on their Fc

domains may be responsible for their serum properties and this has hampered their diagnostic and therapeutic

use [1].

Combining our expertise in IgE biology/immunology and in vivo tumour imaging/radiochemistry, we will

develop optimised in vivo-traceable diagnostic and therapeutic IgE-like molecules with favourable serum half-

lives. We will employ molecular biology to modify: (i) glycosylation sites on antibodies and (ii) glycosylation

enzymes in the corresponding expression systems. We will also reconstitute separately synthesised antibody

fragments to generate chimeric molecules for diagnostic imaging.

Objective rotation+Yr1/2: Alter IgE Fc glycosylation using genetic approaches; determine resultant

glycosylation patterns by immunoblotting and carbohydrate analysis (detection, digestion, mass

spectrometry, fluorimetry).

Objective Yr2/3: Radiolabel IgE glycovariants/chimera, determine their in vivo distribution,

pharmacokinetics/dynamics in an in vivo-traceable melanoma model (radionuclide/CT-fluorescence

multi-scale imaging). Combining traceable tumour cells and IgE-antibodies will allow full preclinical

cross-validation (distribution, redistribution, efficacy).

Objective Yr3: Determine optimised IgE glycovariant functions by characterizing antigen and receptor

binding properties (e.g. ELISA, Biacore, flow cytometry), IgE-mediated signalling (diagnostics and

safety) and tumour cell killing (therapeutic aspect).

These will form the basis for developing IgE immunodiagnostics and immunotherapeutics. This studentship

covers basic and translational research through close interactions with the Comprehensive Cancer Imaging

Centre (KCL&UCL) and St. John’s Institute of Dermatology and benefits from multi-disciplinary experience

in molecular biology, cancer immunology, and multi-modal whole-body in vivo imaging.

Student Background:

Biochemistry, Molecular Biology/Biotechnology, Cell Biology or similar. Also, molecular or life sciences or

related BSc degrees (e.g. chemical biology, pharmacology etc) plus a relevant Master-level degree would be a

good fit.

Two representative publications from supervisors:

Page 13: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

13

[1] Josephs et al (2014) MAbs 6:1, 54-72. doi: 10.4161/mabs.27029. Review. PMID: 24423620

[2] Fruhwirth et al (2014) J Nucl Med 55:4, 686-94. doi: 10.2967/jnumed.113.127480. PMID: 24604910

Page 14: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

14

10.4 Hierarchically designed functionalized self-assembling peptide scaffolds for

bone tissue engineering Co-Supervisor 1: Sanjukta Deb

Research Division or CAG: Tissue Engineering & Biophotonics

E-mail: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/sanjukta.deb.html

Co-Supervisor 2: Lucy Di Silvio

Research Division or CAG: Tissue Engineering & Biophotonics (TEB)

Email: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/lucy.di_silvio.html

Project description:

A major challenge in the development of engineered bone scaffolds is the ability to vascularize and integrate with

the host tissue. Vascularization is important since blood vessels 1) mediate delivery and disposal of nutrients and

metabolic waste (mass transfer) and 2) act as ‘railways’ for the recruitment of osteogenic precursors in order to

promote angiogenensis and osteogenesis. Bioresorbable, biomimetic scaffolds can be tailored to provide

biochemical cues to support and enhance bone tissue regeneration. The Deb group has developed a novel

composite bone scaffold based on a calcium phosphate elastomeric hydrogel composite with favourable

biomechanical and mineralization characteristics. Total resorption has been demonstrated in an in-vivo rabbit

mandibular model in 8 weeks.

The Di Silvio group, is studying the biological enhancement of scaffolds using a novel synthetic self-assembling

peptides (SAP) with potential to exert pro angiogenic/osteogenic effects. In-vitro and in-vivo studies to date,

have demonstrated biocompatibility and an enhancement in cellular response. This project will explore the

angiogenic and bone regenerative capacity of the newly designed bone scaffold in combination with the SAP as

the bioactive molecule, and also in presence of ions such as zinc and strontium, known to promote bone healing.

Year 1: Design and characterisation of the polymer networks

Year 2: Encapsulation of SAP within the polymeric networks, composite formulation and evaluation of

biological activity with in vitro cell culture techniques

Year 3: The effect on mechanical loading and perfusion using a bioreactor

Year 4: In vivo studies to test bone regenerative potential of the constructs

Two representative publications from supervisors:

[1] L. Rojo, B. Gharibi, R. McLister, B. J. Meenan and S. Deb; Self-assembled monolayers of alendronate

on Ti6Al4V alloy surfaces enhance osteogenesis in mesenchymal stem cells. Nature Scientific Reports (NPG)

2016 Scientific Reports | 6:30548 | DOI: 10.1038/srep30548

[2] Buranawat, Borvornwut; Di Silvio, Lucy; Deb, Sanjukta; et al. Evaluation of a beta-Calcium

Metaphosphate Bone Graft Containing Bone Morphogenetic Protein-7 in Rabbit Maxillary Defects, Journal of

Periodontology, 85: 298-307, 2014

Page 15: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

15

11.4 In vivo myelin mapping with PET-MR imaging

Co-Supervisor 1: Federico E. Turkheimer, PhD

Research Division or CAG: Dept. of Neuroimaging, Neuroscience Division

E-mail: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/federico.turkheimer.html

Co-Supervisor 2: Mattia Veronese, PhD

Research Division or CAG: Dept. of Neuroimaging, Neuroscience Division

Email: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/mattia.veronese.html

Project description:

In the brain and spinal cord, nerves are covered by an insulating myelin sheath that allows fast transmission of

electrical impulses and protects the nerve. In demyelinating diseases, the normal myelin sheath is damaged and

patches of demyelination occur causing many neurological symptoms such as paralysis, sensory changes and

blindness. Re-myelination can happen spontaneously or can be induced by compounds acting on

oligodendrocyte precursor cells but to date very little is known about myelin dynamics in vivo.

To improve the understanding of the process and realistically track the impact of intervention there is an essential

need for imaging techniques enabling to specifically quantify remyelination in vivo. Magnetic resonance imaging

(MRI) is the standard image biomarker for myelin but lacks of specificity. It is also influenced by water content,

oedema and inflammatory infiltration.

Recently studies have shown that [11C]PIB, a radiolabelled stilbene derivative for use with positron emission

tomography (PET), originally developed as biomarkers of amyloid plaques in Alzheimer’s disease, can be applied

to image myelin dynamics in MS patients. However, [11C]PIB has a short half-life and cannot be used clinically

as it requires an on-site cyclotron for production. Hence the main aim of this project is to repurpose commercially

available fluorinated stilbene and benzothiazole derivatives (Vyzamil – GE Healthcare; Neuraceq - Piramal;

AMYViD - Ely Lilli), currently used with PET to image amyloid deposits in dementia, as myelin imaging agents.

Furthermore, we wish to combine synergistically the specificity of these myelin markers with the high resolution

of MRI measures (magnetisation transfer imaging, diffusion-weighted imaging and T2-relaxometry) to obtain a

PET-MRI specific and sensitive in-vivo imaging assay.

Specifically this project aims to 1) Develop specific quantitative methodology to measure with Vyzamil,

Neuraceq and AMYViD myelin density in healthy volunteers and subjects with Multiple Sclerosis 2) to develop

a synergistic computational methodology to combine PET and MR myelin imaging modalities into a unique

multimodal assay. The work will be mainly computational and will exploit multiple datasets of PET and MRI

data for both healthy controls and patients with multiple sclerosis currently acquired at KCL and Imperial

College in on-going trials

Two representative publications from supervisors:

[1] Bodini B, Veronese M, Garcia-Lorenzo D, Battaglini M, Poirion E, Chardain, A, Freeman L, Louapre

C, Tchikviladze, Papeix C, Dolle F, Zalc B, Lubetzki c, Bottlaender M, Turkheimer F, Stankoff B. Dynamic

imaging of individual remyelination profiles in multiple sclerosis. Ann Neurol, 2016 Feb 18. doi:

10.1002/ana.24620

[2] Veronese M, Bodini B, Garcia-Lorenzo D, Battaglini M, Bongarzone S, Comtat C, Bottlaender M,

Stankoff B, Turkheimer F. Quantification of 11CPIB PET for myelin imaging in the human brain: a test-retest

reproducibility study in high resolution research tomograph. J Cereb Blood Flow Metab, 2015

Nov;35(11):1771-82.

Page 16: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

16

12.4 Targeted radionuclide therapy: a new weapon in the war against microbial

multi-drug resistance

Co-Supervisor 1: Philip Blower

Research Division or CAG: ICAB

E-mail: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/philip.blower.html

Co-Supervisor 2: Vincenzo Abbate

Research Division or CAG: IPS

Email: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/vincenzo.abbate.html

Name of Collaborating Clinician: Dr. Nicholas M. Price FRCP PhD DTM&H

Research Division or CAG: Dept of Infectious Diseases, Guy's & St Thomas' NHS Foundation Trust

Email: [email protected]

Project description:

Bacterial multi-drug resistance is major threat to human health, making once-treatable diseases ever more

difficult to treat. This project will develop a new anti-microbial modality, borrowed from cancer treatment:

targeted radionuclide therapy or “molecular radiotherapy.” In this "Trojan Horse" approach, a radioisotope is

smuggled into bacterial cells exploiting their need for iron. Bacteria acquire their iron from the host by secreting

low molecular weight siderophores that scavenge ferric ions and shuttle them back inside the bacterium.

These siderophores also efficiently bind gallium, an element that has medically useful radionuclides for imaging

and molecular radiotherapy. 67Ga emits Auger electrons with a range commensurate with the size of bacterial

cells, and should therefore selectively kill the bacteria to which they are targeted. Thus, by administering 67Ga

as a siderophore complex, we envisage selectively killing bacteria while avoiding significant host toxicity. We

will synthesise siderophore analogues that bind to outer membrane receptors of both gram positive and gram

negative organisms, such as those in Figure 1. To prove the concept we will focus on infected vascular grafts and

stents, a significant clinical problem in cardiovascular surgery.

The project will suit a student with a first degree in biologically oriented chemistry. In year 1 or MRes rotation,

the candidate will assess the toxicity of 67Ga in bacteria, developing radiochemistry, radiobiology and

microbiology skills and knowledge of microbial multi-drug resistance. In year 2 the candidate will acquire

chemical synthesis and analytical skills by designing and preparing siderophore-analogues by a well-established

solid-phase route, and in years 3-4, test the efficacy of the new 67Ga complexes biologically and demonstrate

the concept.

Two representative publications from supervisors:

[1] Dual Selective Iron Chelating Probes with a Potential to Monitor Mitochondrial Labile Iron Pools

Abbate, V., Reelfs, O. S., Kong, X., Pourzand, C. & Hider, R. C. 2015 In : CHEMICAL

COMMUNICATIONS- ROYAL SOCIETY OF CHEMISTRY. 52, p. 784-787

[2] Ma MT, Cullinane C, Imberti C, Baguña-Torres J, Terry SYA, Roselt P, Hicks RJ, Blower PJ. New

tris(hydroxypyridinone) bifunctional chelators containing isothiocyanate groups provide a versatile platform for

rapid one-step labeling and PET imaging with 68Ga3+. Bioconjugate Chem 2016;27:309–318.

Page 17: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

17

13.4 Improving stratification of valve stenosis through novel echocardiographic and

computational methods

Co-Supervisor 1: Dr. Pablo Lamata

Research Division/Department or CAG: Division of Imaging Sciences and Biomedical Engineering

E-mail: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/pablo.lamata.html

Co-Supervisor 2: Dr. Robert Eckersley

Research Division/Department or CAG: Division of Imaging Sciences and Biomedical Engineering

Email: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/robert.eckersley.html

Name of Collaborating Clinician: Prof. Mark Monaghan

Research Division/Department or CAG: Cardiovascular Clinical Academic Group

Email: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/en/persons/mark-monaghan(2693c2a3-a6bb-4b9f-a460-

12d174c5b029).html

Project description:

Clinical problem: Valve stenosis is a cardiovascular condition where the valve does not open properly

Echocardiography has become the key tool for the diagnosis and evaluation of this condition, mainly thanks to

its non-invasiveness. The three main parameters extracted from this modality are the aortic jet velocity, the

transvalvular pressure drop (using the Bernoulli principle), and the valve area. Nevertheless, the assessment of

these variables is subject to limitations such as small imaging windows, shadowing or malalignments.

Hypothesis: Our recent research working with MRI has revealed a new factor that does improve the accuracy

of the widely adopted Bernoulli principle. The hypothesis is that echocardiographic data can provide the

necessary velocity information that will allow the translation of our findings, and thus improve the reliability and

accuracy of the pressure drop for the stratification of valve stenosis.

Objectives: the goal is to design a novel method to assess the severity of valve stenosis through the combination

of novel concepts in echocardiographic acquisition and computational fluid dynamics. Specifically, the student

will:

- Investigate the combination of continuous and colour Doppler sequences for the estimation of pressure

gradients through a novel computational formulation (year one).

- Investigate a complementary approach, using ultrafast planar wave imaging with contrast agents (year two).

- Design and validate the novel method, combining the strengths of the solutions explored (year three).

Background: the ideal candidate will have a BSc in Computer Science, Biomedical Engineering, Mathematics

or Physics.

Skills training: echocardiographic acquisition, reconstruction and analysis. Computational analysis skills in

order to assess pressure from echocardiographic data.

Two representative publications from supervisors:

[1] Non-invasive pressure difference estimation from PC-MRI using the work-energy equation. Med Image

Anal. 2015 26(1):159-172

[2] In vivo acoustic super-resolution and super-resolved velocity mapping using microbubbles. IEEE T Med

Imaging. 2015 34(2):433-440

Page 18: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

18

14.4 Cancer stem cell theranostics: Copper compounds for both diagnostic PET

imaging and chemotherapy

Co-Supervisor 1: Michelle Ma

Research Division or CAG: Division of Imaging Sciences (Faculty of Life Sciences and Medicine)

E-mail: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/michelle.ma.html

Co-Supervisor 2: Kogularamanan Suntharalingam

Research Division or CAG: Department of Chemistry (Faculty of Natural and Mathematical Sciences)

Email: [email protected]

Website: http://www.kcl.ac.uk/nms/depts/chemistry/people/core/suntharalingamrama.aspx

Project description:

Cancer stem cells (CSCs) are a population of tumour cells linked to cancer relapse. CSCs self-renew, differentiate

and remain untouched by conventional therapies. Small molecules that target CSCs that can be combined with

conventional chemo-/radio-therapies have potential for more sustained responses in cancer patients. We have

shown that novel copper compounds bearing non-steroidal anti-inflammatory drugs can potently and selectivity

kill CSCs over bulk cancer cells. [1] They also demonstrate selectivity for hypoxic CSCs over normoxic cells.

Non-radioactive copper could be substituted for radioactive beta-emitting copper (Cu-64, Cu-62) in these

compounds. The avidity of the radioactive compounds for CSCs would remain the same, allowing for (i) whole-

body imaging of these compounds using Positron Emission Tomography (PET), and (ii) detailed studies on their

accumulation, retention and selectivity in different types of tissue (at the cellular, organ and whole-body level).

[2]

The student will prepare radioactive and nonradioactive copper compounds, enabling characterisation of their

biology in (i) CSC cultures, (ii) ex vivo models of hypoxia (collaboration with Dr Rick Southworth), and (iii)

mice bearing tumours with CSCs. This information will inform design of second-generation compounds. The

student will also probe the radioactive compounds’ potential to provide diagnostic CSC information at a whole-

body level using PET imaging. A diagnostic CSC PET radiopharmaceutical would have clinical impact,

particularly if coupled to a (nonradioactive) CSC chemotherapy.

This project is interdisciplinary, linking the Department of Chemistry with the Division of Imaging Sciences. It

involves chemical and radiochemical synthesis, biophysical analysis, molecular biology, and cellular and in vivo

imaging (PET). It will run in parallel to, and be financially co-supported by, a key component (PET metallomics)

of the proposed renewed Wellcome Medical Engineering Centre and a currently proposed Wellcome

Collaborative award on metallodrugs in cancer, as well as the current CRUK/EPSRC Cancer Imaging Centre

at King’s/UCL.

Two representative publications from supervisors:

[1] Boodram NJ, Mcgregor IJ, Bruno PM, Cressey PB, Hemann MT, Suntharalingam K, “Breast cancer

Stem cell potent copper(II)–non-steroidal anti-inflammatory drug complexes” Angewandte Chemie

International Edition, 2016, 55, 2845-2850.

[2] Ma MT, Cullinane C, Imberti C, Terry SYA, Roselt P, Hicks RJ, Blower PJ, “New

tris(hydroxypyridinone) bifunctional chelators containing isothiocyanate groups provide a versatile platform for

rapid one-step labeling and PET imaging with 68Ga3+”, Bioconjugate Chemistry, 2016, 27, 309-318.

Page 19: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

19

15.4 Radiobiological assessment of radionuclide pairs used in theranostic (imaging

and therapy) approaches.

Co-Supervisor 1: Dr Samantha YA Terry

Research Division or CAG: Imaging Sciences and Biomedical Engineering

E-mail: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/samantha.terry.html

Co-Supervisor 2: Dr Lefteris Livieratos

Research Division or CAG: Department of Biomedical Engineering; Imaging and Biomedical Engineering CAG

and Department of Nuclear Medicine, Guy’s & St Thomas NHS FT

Email: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/Lefteris.Livieratos.html

Project description:

Despite the use of radionuclides for imaging and therapy becoming more commonplace, their biological effects

are poorly understood. Little to no dosimetric or radiobiological considerations are taken into account when

radionuclides are administered and biological interpretation of dosimetry is still inaccurate. We do not know the

risks associated with multiple cycles of radionuclide imaging nor if radiopharmaceuticals are used to their

maximum therapeutic potential. Patients could potentially safely have more cycles of imaging and therapy than

currently supposed.

The aim is to determine the true safety of radionuclides for PET and SPECT imaging and when beta, alpha

particles and Auger electrons are most effective without harming healthy cells. Does cell localisation matter and

how for which radionuclides? Do neighbouring healthy cells act as if they too have been irradiated?

1. Expand and characterise a library of compounds with different cellular localisation properties using the

following combinations:

2. Study the biological effects

On and off target

Methods:

cell kill, miRNA and SNP signatures, DNA (a-b) and

chromosomal damage (c) and repair, reactive oxygen

and nitrogen species

In vitro (cells) and ex vivo (mice)

3. Dosimetry of above to determine absorbed doses

The combination of experimental radiobiology with localised dosimetry will aid the understanding of the

mechanisms involved in theranostics to inform the process of radiochemistry development (e.g. exclude non-

internalising agents labelled with Auger emitters below a certain energy threshold) and clinical translation (e.g.

redefine critical limits of organ absorbed dose for certain radiation emissions).

3. Dosimetry of above to determine absorbed doses

Page 20: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

20

The combination of experimental radiobiology with localised dosimetry will aid the understanding of the

mechanisms involved in theranostics to inform the process of radiochemistry development (e.g. exclude non-

internalising agents labelled with Auger emitters below a certain energy threshold) and clinical translation (e.g.

redefine critical limits of organ absorbed dose for certain radiation emissions).

Two representative publications from supervisors:

[1] Relationship between chromatin structure and sensitivity to molecularly-targeted Auger electron

radiation therapy. Terry SYA and Vallis KA(2012) Int J Rad Onc Biol Phys 83:1298-305.

[2] Chuamsaamarkkee, K., Blower, P. J., & Livieratos, L. (2014). Dosimetric Evaluation based on

Preclinical Data of 188Re-Perrhenate versus 131I-Sodium Iodide for Improved Treatment of Benign Nodular

Thyroid Disease. Eur J Nuc Med Mol Imag 41, 280.

Page 21: Theme 4 Imaging and Biomedical Engineering 2017/18 · M, Schaeffter T, Razavi RS, O'Neill MD. Repeat left atrial catheter ablation: Cardiac magnetic resonance prediction of endocardial

21

16.4 Nano-scale engineering of the stem cell niche to generate iPS-hepatocytes for

treatment of liver failure Co-Supervisor 1: Dr. Ciro Chiappini

Research Division or CAG: Department of Craniofacial Development and Stem Cell Biology

E-mail: [email protected]

Website: http://chiappiniliab.com

Co-Supervisor 2: Dr. Tamir Rashid

Research Division or CAG: Centre for Stem Cell Biology and Regenerative Medicine & Institute for Liver

Studies

Email: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/tamir.rashid.html

Name of Collaborating Clinician (if not one of the two co-supervisors): Professor Reza Razavi

Research Division/Department or CAG: Imaging Sciences and Biomedical Engineering

Email: [email protected]

Website: https://kclpure.kcl.ac.uk/portal/reza.razavi.html

Project description:

Liver failure is a growing clinical burden claiming over 10,000 lives per year in the UK. Transplantation of

hepatocytes derived from iPSCs offers an appealing solution to this problem. To become clinically relevant,

maturation of progenitor cells currently generated is required. Since direct mechanical stimulation of the nucleus

can contribute to maturation by controlling gene expression we hypothesize this micro-environmental (niche)

cue is a critical missing factor in the process. This project will therefore combine direct stimulation of the nucleus

with organized 3-D culture to engineer a cell niche capable of maturing iPSCs into adult hepatocytes.

To achieve this, working as a valued member of our collaborative team, the student will develop a microfluidic

system to control confinement of the cell nucleus in three dimensions and assess the resulting epigenetic changes

at the chromatin, histone and DNA level. The epigenetic remodelling will be leveraged in combination with the

stimuli from the 3-D culture to direct maturation.

Techniques: Biomaterial design, microfluidics, 3-D culture, stem cell differentiation, advanced optical imaging,

cell/molecular biology, epigenetic & genetic analysis and rodent models of liver failure.

Rotation: Assess epigenetic remodelling induced by nuclear stimulation in existing microfluidic devices.

Year 1: Develop a novel microfluidic system for controlled and direct nuclear stimulation.

Year2: Induce controlled epigenetic remodelling through direct stimulation of the nucleus.

Year3: Develop a model of the hepatic niche combining direct nuclear stimulation with 3D culture & validate

the cell-niche product in pre-clinical rodent models of liver failure

Student Background:

The student will have a background in stem cell biology, molecular biology and microfluidic.

Two representative publications from supervisors:

[1] C. Chiappini, E. DeRosa, J.O. Martinez, X. Liu, J. Steele, M. Stevens, E. Tasciotti, Biodegradable

silicon nanoneedles delivering nucleic acids intracellularly induce localized in vivo neovascularization, Nature

Materials 14, 532-539 (2015). http://bit.ly/1lABqFr

[2] Rashid & Yusa et al. Nature Targeted gene correction of α1-antitrypsin deficiency in induced

pluripotent stem cells, Nature 478, 391–394 (2011)